Hello All,
I have a Polaroid Sprintscan 4000 (not the Plus version) and am using
Vuescan. When I scan a slide (either Kodachrome or Provia/35mm), the
white areas (such as a building illuminated by the sun; or pages of an
open book) in the scan will exhibit a halo effect. This appears as
a kind
forget how clean the scans originally were.
- Original Message -
From: Robert DeCandido, PhD [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Saturday, August 17, 2002 12:46
Subject: [filmscanners] Re: Halo Effect
Hello All,
I have a Polaroid Sprintscan 4000 (not the Plus version) and am
Robert DeCandido, PhD wrote:
I have a Polaroid Sprintscan 4000 (not the Plus version) and am using
Vuescan. When I scan a slide (either Kodachrome or Provia/35mm), the
white areas (such as a building illuminated by the sun; or pages of an
open book) in the scan will exhibit a halo
1. Sensor crosstalk - the brightly lit areas of the CCD may leak some of
their light into the shady areas, and there ya go. Slide film has a much
Does the halo only appear along one direction, or evenly in all
directions around the highlight? Since film scanners only use one CCD
line, this
Major A wrote:
Does the halo only appear along one direction, or evenly in all
directions around the highlight? Since film scanners only use one CCD
line, this leaking can obviously only take place in on direction.
Hi, Major,
yes, you're right. I remember the halos to be in each
I can think of a few potential causes. One may be just the way you have
the software set up in terms of gamma or contrast, however, this can
also occur due to a dirty optical path, due to dust, smoke, or other
household pollutants coating the lens, and mirrors or other optical
surfaces within
